T14643.hs:5:18: warning: [-Wpartial-type-signatures (in -Wdefault)]
    • Found extra-constraints wildcard standing for ‘()’
    • In the type signature: af :: (Num a, _) => a -> a

T14643.hs:5:18: warning: [-Wpartial-type-signatures (in -Wdefault)]
    • Found extra-constraints wildcard standing for ‘()’
    • In the type signature: ag :: (Num a, _) => a -> a